A
alanl
Called out to newly installed boiler, using the old Drayton MA1 3 port valve.
When HW is on, CH is also on.
Checked all connections/wiring, all seemed connected correctly.
But, getting voltage at the white cable (HW on) at the valve.
Clearly something wrong there, as there should be no voltage unless CH is calling.
So, long story short, 'HW on' cable was not live when disconnected from valve.
But white wire was live, clearly getting a back-feed from somewhere.
Before I go and order a new actuator, I'd like confirmation that it is likely to be a faulty microswitch on the valve causing this fault, or have I missed something?
Thanks
Alan.
When HW is on, CH is also on.
Checked all connections/wiring, all seemed connected correctly.
But, getting voltage at the white cable (HW on) at the valve.
Clearly something wrong there, as there should be no voltage unless CH is calling.
So, long story short, 'HW on' cable was not live when disconnected from valve.
But white wire was live, clearly getting a back-feed from somewhere.
Before I go and order a new actuator, I'd like confirmation that it is likely to be a faulty microswitch on the valve causing this fault, or have I missed something?
Thanks
Alan.